Instituto de Engenharia Mecânica, Portugal
Centro Sviluppo Materiali S.p.A, Italy
Onderzoekscentrum Voor Aanwending Van Staal N.V., Belgium
Centre Internacional de Metodes Numerics en Enginyeria, Spain
University of Thessaly – Research Committee, Greece
Rheinisch-Westfälische Technische Hochschule Aachen, Germany
Consorzio Pisa Ricerche, Italy
Salzgitter Mannesmann Forschung GmbH, Germany
Steel members subjected to extreme loading conditions (e.g. earthquakes, hurricanes, support settlements, industrial plant shutdown) undergo large deformations, associated with widespread yielding, leading to fracture, either due to monotonic loading or ultra-low-cycle fatigue (ULCF). This project aims at developing innovative computational methodologies that simulate steel material fracture under ultra-low-cycle fatigue following a multiscale approach, with calibration from both micro and macroscale testing. The project focuses on base steel material only and on pipeline applications. Project results (experimental/numerical), will be used to develop design guidelines for strain-based ULCF design, amending current fatigue design practice (EC3, EC8).
Principal Investigator for U.Th.:
Spyros A. Karamanos
36 months (2011 - 2014)
Figure 1: Stress-strain curve for reverse loading of high-strength steel.
Figure 2: Stress-strain curve for reverse loading of P355 steel.